Implication of grain boundary engineering on high temperature hot corrosion of alloy 617

被引：69

作者：

Deepak, K. ^{[1
]}

Mandal, Sumantra ^{[2
]}

Athreya, C. N. ^{[1
]}

Kim, Dong-Ik ^{[3
]}

de Boer, B. ^{[4
]}

Sarma, V. Subramanya ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

[2] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India

[3] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea

[4] VDM Met GmbH, Plettenberger Str 2, D-58791 Werdohl, Germany

来源：

CORROSION SCIENCE | 2016年 / 106卷

关键词：

Superalloys; SEM; High temperature corrosion; Segregation; SUPERALLOY; BEHAVIOR; SENSITIZATION; RESISTANT; STRAIN; WATER;

D O I：

10.1016/j.corsci.2016.01.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of grain boundary engineering (GBE) on high-temperature hot corrosion behavior of alloy 617 was evaluated by exposing both the as-received (AR) and GBE specimens in a salt-mixture of (75% Na2SO4 + 20% NaCl + 5% V2O5) at 1273 K for 24 h. The AR specimen having continuous network of random high angle grain boundaries (HAGBs) has undergone hot corrosion and substantial depletion/segregation of alloying elements through the entire cross section. The GBE specimen exhibited significantly reduced hot corrosion and depletion/segregation of alloying elements. This is attributed to the high fraction of 3-CSL triple junctions which break the percolation in the random HAGBs network. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：293 / 297

页数：5

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